This kit gives you three precision-machined billet clutch weights that adjust from 64 to 75 grams using a simple set-screw system, so you can dial in target RPM without buying multiple weight sets. Each weight is heat-treated for hardness and finished with yellow zinc plating for corrosion resistance, and the included six tungsten washers push the range up to 90 grams for high-horsepower or turbo builds. The set-screw tuning hardware and complete instructions let you compensate for elevation, modifications, or riding style quickly and repeatably. Whether you are tuning a trail sled or a modified mountain build, this system keeps clutch calibration accurate and consistent.